Dragon Age: Total War is a currently unreleased Dragon Age-themed total conversion mod for Medieval 2 Total War: Kingdoms. The mod features 23 unique factions throughout various locations across the continent of Thedas each featuring unique unit rosters, faction mechanics, scripts, campaign conditions, gameplay styles, characters, and much more. Dragon Age: Total war aims to provide a distinct and meticulously lore-friendly yet highly familiar insight into BioWare's world of Thedas, all the while expanding further on the lore of Thedas and exploring areas previously unseen in any form of Dragon Age media. All rights to Dragon Age belong to EA and it's subsidiary studio, BioWare.
Tevinter is often reviled by nations devout to the Andrastian Chantry for one major reason; it's views on magic. The Tevinter Imperium as a whole views magic as doubtlessly beneficial, and it is heavily woven into the culture, history, and military of the Imperium. As such, the mages of Tevinter Circles of Magi do not need to fear the same oppression that many of the Circle Mages in neighboring nations fear. These liberties however, have often led Tevinter mages into the practice of blood magic, and worse. Indeed, Tevinter mages who know nothing of blood magic are quietly considered incompetent by their peers and instructors. On the battlefield, a Tevinter mage is permitted to do whatever it takes to bring glory and victory to the Imperium, and this of course, includes the use of forbidden magic if need be. The armies of Tevinter have for long remained powerful and fearsome due to the powers mages serving along side them are able to unleash.
Are there Circles in Tevinter?
Yes, the original Circles of Magi were in ancient Tevinter, and because of how the Imperium views magic, they are not controlled by a Chantry or Templars as southern nations' circles are.
Circle of Magi alone pretty much refers to a group/establishment/or of mages.